1608964403 has 4 divisors (see below), whose sum is σ = 1693646760. Its totient is φ = 1524282048.

The previous prime is 1608964393. The next prime is 1608964429. The reversal of 1608964403 is 3044698061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3044698061 = 33871 ⋅89891.

It is a cyclic number.

It is not a de Polignac number, because 1608964403 - 2¹² = 1608960307 is a prime.

It is a super-2 number, since 2×1608964403² = 5177532900242292818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1608964453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42341150 + ... + 42341187.

It is an arithmetic number, because the mean of its divisors is an integer number (423411690).

Almost surely, 2^1608964403 is an apocalyptic number.

1608964403 is a deficient number, since it is larger than the sum of its proper divisors (84682357).

1608964403 is an equidigital number, since it uses as much as digits as its factorization.

1608964403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84682356.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1608964403 is about 40111.8985215110. The cubic root of 1608964403 is about 1171.7873679471.

The spelling of 1608964403 in words is "one billion, six hundred eight million, nine hundred sixty-four thousand, four hundred three".